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                勒索病毒WannaCry（及其变种）全面爆发！
              
            
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        <p>2017年5月13日，一款名为WannaCry（及其变种）的勒索病毒在全球范围内爆发，全球各地的大量组织机构遭受了它的攻击。受害者电脑会被黑客锁定，提示支付价值相当于300美元（约合人民币2069元）的比特币才可解锁。<br><img src="http://opxoapzhs.bkt.clouddn.com/wenzhang/24ADAEE9-A648-4837-9C04-DDE5BE642F01.png" alt="图片"><br>国内多所院校出现ONION勒索软件感染情况，磁盘文件会被病毒加密为.onion后缀，该勒索软件运用了高强度的加密算法难以破解，被攻击者除了支付高额赎金外，往往没有其他办法解密文件，只有支付高额赎金才能解密恢复文件，对学习资料和个人数据造成严重损失。</p>
<p>根据网络安全机构通报，这是不法分子利用NSA黑客武器库泄漏的“永恒之蓝”发起的病毒攻击事件。<br>从被感染机器的情况来看，一是操作系统、Office软件等没有采用正版软件，且漏洞、补丁更新不及时；二是不常用端口没有封闭；三是个人网络安全意识淡漠，没有定期备份文档的习惯。</p>
<blockquote>
<p><strong>提醒各位阿里云、腾讯云的用户</strong>：</p>
</blockquote>
<p>   1.尽量不要使用校园网连接腾讯云服务器</p>
<p>   2.做好系统快照，数据备份等工作。</p>
<p>   3.对服务器系统进行安全检查和加固！</p>
<p>   4.配置好服务器安全组策略，对不使用的非必要端口进行屏蔽。</p>
<p>   5.尽量不要使用Windows server 2003系统</p>
<blockquote>
<p><strong>防范措施</strong>：</p>
</blockquote>
<p>1、为计算机安装最新的安全补丁，微软已发布补丁MS17-010修复了“永恒之蓝”攻击的系统漏洞，请尽快安装此安全补丁 下载地址：<a href="https://technet.microsoft.com/zh-cn/library/security/MS17-010" target="_blank" rel="external">https://technet.microsoft.com/zh-cn/library/security/MS17-010</a> 对于windows XP、2003等微软已不再提供安全更新的机器，可使用360“NSA武器库免疫工具”检测系统是否存在漏洞，并关闭受到漏洞影响的端口，可以避免遭到勒索软件等病毒的侵害。免疫工具：<strong><a href="http://dl.360safe.com/nsa/nsatool.exe" target="_blank" rel="external">点此下载</a></strong>。<br>2、关闭445、135、137、138、139端口，关闭网络共享。<br>3、强化网络安全意识：不明链接不要点击，不明文件不要下载，不明邮件不要打开……<br>4、尽快（今后定期）备份自己电脑中的重要文件资料到移动硬盘、U盘，备份完后脱机保存该磁盘。<br>5、建议仍在使用windows xp，windows 2003操作系统的用户尽快升级到window 7/windows 10，或windows 2008/2012/2016操作系统。<br>大家速度下载修复吧，最近这几天这个病毒很猖狂，把修复工具多多发给身边的朋友！</p>
<p>反查修复软件NSA武器库防御工具：<strong><a href="https://www.zhsrc.cn/wp-content/uploads/2017/05/2017051303033651.rar" title="点我下载" target="_blank" rel="external">点我下载</a></strong></p>

      
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            var url = item.get('url');
            var time = item.get('time');
            var element = document.getElementById(url);

            $(element).find(COUNT_CONTAINER_REF).text(time);
          }
          for(var i = 0; i < entries.length; i++) {
            var url = entries[i];
            var element = document.getElementById(url);
            var countSpan = $(element).find(COUNT_CONTAINER_REF);
            if( countSpan.text() == '') {
              countSpan.text(0);
            }
          }
        })
        .fail(function (object, error) {
          console.log("Error: " + error.code + " " + error.message);
        });
    }

    function addCount(Counter) {
      var $visitors = $(".leancloud_visitors");
      var url = $visitors.attr('id').trim();
      var title = $visitors.attr('data-flag-title').trim();
      var query = new AV.Query(Counter);

      query.equalTo("url", url);
      query.find({
        success: function(results) {
          if (results.length > 0) {
            var counter = results[0];
            counter.fetchWhenSave(true);
            counter.increment("time");
            counter.save(null, {
              success: function(counter) {
                var $element = $(document.getElementById(url));
                $element.find('.leancloud-visitors-count').text(counter.get('time'));
              },
              error: function(counter, error) {
                console.log('Failed to save Visitor num, with error message: ' + error.message);
              }
            });
          } else {
            var newcounter = new Counter();
            /* Set ACL */
            var acl = new AV.ACL();
            acl.setPublicReadAccess(true);
            acl.setPublicWriteAccess(true);
            newcounter.setACL(acl);
            /* End Set ACL */
            newcounter.set("title", title);
            newcounter.set("url", url);
            newcounter.set("time", 1);
            newcounter.save(null, {
              success: function(newcounter) {
                var $element = $(document.getElementById(url));
                $element.find('.leancloud-visitors-count').text(newcounter.get('time'));
              },
              error: function(newcounter, error) {
                console.log('Failed to create');
              }
            });
          }
        },
        error: function(error) {
          console.log('Error:' + error.code + " " + error.message);
        }
      });
    }

    $(function() {
      var Counter = AV.Object.extend("Counter");
      if ($('.leancloud_visitors').length == 1) {
        addCount(Counter);
      } else if ($('.post-title-link').length > 1) {
        showTime(Counter);
      }
    });
  </script>



  

  

  

  

</body>
</html>
